Sighting device



ummman 3a-23n (H-Q 193649021 SR 7 M. BARTHOLDY.

SJGHTING DEVICE.

APPLICATION FILED SEPT. 4. 1920.

Patented Dec. 28, 1920.

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M. BARTHOLDY.

SIGHTING DEVICE.

APPLICATION FILED SEPT. 4. I920. 1,864,021 Patented Dec. 28, 1920.

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M. BARTHOLDY.

SIGHTING DEVICE.

- APPLICATION FILED SEPT. 4, I920. 1,364,021. I Patented Dec. 28, 1920.

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MAX BARTHOLDY, 0F ESSEN, GERMANY, ASSIGNOR TO FRIED. KRUPP AKTIEN-GESELLSCHAFT, OF ESSEN-ON-THE-RUHR, GERMANY.

SIGHTING DEVICE.

Specification of Letters Patent.

Patented Dec. 28, 1920.

Application filed September 4, 1920. Serial No. 408,394.

To all whom it may concern:

Be it known that I, Max BARTHOLDY, residing at Essen, Germany, a citizenof the German Republic, have invented certain new anduseful Improvementsin Sighting Devices, of which the following is a specification.

This invention relates to sighting devices which are mounted on a memberwhich takes part in the elevation movement of the gun barrel, and areprovided with an arrangement for allowing for influences which, such aserosion of the gun barrel for example, may cause a variation in thenormal range of the gun. The object of the invention is to provide forsuch arrangement a construction which shall be as simple as possible andtherefore most useful for'military purposes.

The invention will be described with reference to the accompanyingdrawings, which show two constructions of the present invention.

Figure 1 is a side elevation, partially in section, of the firstconstruction of sighting device together with the adjacent parts of thegun,

Fig. 2 is a plan view corresponding to Fig. 1, partially in section, and

Fig. 3 is a view corresponding to Fig. 1 with certain parts in anotherposition,

Fig. 1 is a detail of Fig. 1, shown in section, and on a larger scale,

Fig. 5 is a section on the line 55 of Fig. 4 looking from the left.

Figs. 6 to 13 relate to the second construction of sighting device, andof these,

Fig. 6 is a side elevation corresponding to Fig. 1,

Fig. 7 is a plan view corresponding to Fig. 6 partially in section,

Fig. 8 is a view corresponding to Fig. 6 with certain parts in anotherposition,

Fig. 9 is the right-hand end view corresponding to Fig. 6, partially insection, on the line 9-9 of this figure.

Figs. 10 to 13 are sections on the lines 1010, 1111, 1212, and 1313 ofFig. 8.

The first construction will be described first.

Referring to the drawings, on the slide carrier A, which is constructedas an annular body and in which the gun barrel is guided in the usualway, there is mounted parallel with the axis of the horizontal trunnionsa a pin a by means of an arm a rigidly attached to the slide carrier. Onthis pin a are pivotally mounted two rods B and C situated opposite toeach other, the lower rod 13 carrying on its free end an attachment barB which is sector-shaped and curved concentrically with the axis of thepin a and is guided in an attachment sleeve a mounted on the slidecarrier A, while the upper bar C carries a sighting telescope C whichdetermines the direction of the sighting line. The attachment bar B isadjusted to the angle which corresponds to the range of the target bymeans of an adjusting pinion D, which is mounted in the attachmentsleeve a and provided with a milled head -(Z and engages with a seriesof teeth Z2 on the attachment bar B On the attachment sleeve a is alsoprovided a bar a (see Figs. 1 and 3) provided with a range graduation a,the corresponding reading-0H mark Z2 being placed on the attachment bar13 On the lower bar B are provided two lugs E rigidly connected thereto,which} are arranged like a fork, as shown in the drawings, and betweenwhich a rocking lever F is adjustably mounted on two pins 0 and 0 Thisrocking lever F has in it a slot 7 curved as the arc of a circle, inwhich is guided a sliding piece G which consists of two parts connectedtogether by a pivot bolt 9 This sliding piece G is connected by thepivot bolt g to one end of a connecting rod H, the other end of which isconnected by a pivot bolt 0 to the upper bar C. To the connecting rod His attached a second connecting rod J, the other end of which isconnected by means of the arm (1,2 to the slide carrier A. The length ofthe connect ing rod H is equal to the radius of curvature of the slot fin the rocking lever F, so thatthis latter, as shown in Figs. 1 and 4:,can be brought into an angular position with respect to the bar B, inwhich its axis of curvature coincides with the axis of rotation of thepivot bolt 0 The arrangement is also so contrived that when the bars Band C and the rocking lever F are in the position shown in Figs. 1 and4, in which, on the one hand, the sighting line of the sightingtelescope C is parallel with the longitudinal axis of the gun barrel;and on the other hand, the axis of curvature of the rocking lever Fcoincides with the axis of rotation of the pin 0 the axis of oscillation(the axis of the pins 6 and c of the rocking lever F coincides with theaxis of the pin 9 The rocking lever F is adjusted by means of a worm K,which is provided with an operating device and is mounted on the lowerend of the lug E and engages with a series of worm teeth f on therocking lever F arranged sectorwise. The angular position imparted tothe rocking lever F by means of the operating-device k is read off bymeans of a mark m (see Figs. 1 and 3), which is situated on a disk Mpivotally connected to the rocking lever F by a spur wheel gearing m f(see Figs. 4 and 5), and is opposite an angle graduation e which issituated on a part 6 (see Fig. 5) rigidly attached to one of the lugs E.

The description of the working of the sighting device will be commencedwhen the position of the parts are as shown in Figs. 1 and at, in whichposition the sighting telescope is set to the Zero of the range of thetarget and the rocking lever F is secured with respect to the rod B inthat position in which its axis of curvature coincides with the axis ofrotation of the pivot bolt c. When using the sighting device, theattachment bar B is adjusted to the elevation corresponding to the rangeof the target by rotating the milled head al This adjustment of theattachment bar B is taken up by the bar C, which rotates about the sameaxis because it is pivotally connected with the attachment bar B by thegearing members F G H J. The connecting rod J also rotates theconnecting rod H in the direction of the arrow as (see Fig. 1) about theaxis of the pivot pin 0 the sliding piece G changing its position in theslot f in the rocking lever F. 'As, however, the axis of curvature ofthe recess 7 coincides with the axis of rotation of the pin 0 when therocking lever F is in the position stated, the gearing members J G g Fcause no change in the angular adjustment imparted to the bar C by meansof the gearing D 6 The bar C, and consequently also the telescope Gwhich determines the direction of the sighting line, always rotatestherefore when the rocking lever F is in the angular position stated,through the same angle as the attachment bar B If, however, the initialvelocity of the projectiles has become lessened by erosion of the gunbarrel for example, the rocking lever F is rotated by means of theoperating device 717 in the direction of the arrow 2 (see Fig. 3), untilthe mark m is opposite the division mark of the graduation whichcorresponds to the diminished initial Velocity. The result of this isthat the gearing J H G g F augments the angle of adjustment imparted tothe sighting telescope C by means of the gearing D 6 by an amount whichcorresponds to the diminished initial velocity. When the sightingtelescope is adjusted to the angle corresponding to the zero of therange of the target, this amount is itself equal to Zero, as the axis ofoscillation of the rocking lever F coincides, when the attachment bar Bis adjusted to correspond to the zero of the range of the target, Withthe axis of the pivot pin 9 and increases with the increasing angle ofadjustment.

The special advantage of the sighting device described, consists in thefact that the gearing which is provided for allowing for the influenceof the diminished initial velocity, is of a simple construction andtherefore useful for military purposes, and in which any particularcurved surfaces which are difiicult to make are avoided, and the use ofordinary attachment sighting devices is rendered possible withoutfurther alterations.

The second constructional of the present invention shown in Figs. 6 to13, is distinguished by the fact that in the arrangement for allowingfor the influences which may be brought about by a change in the normalrange of the gun, the wear of the several moving parts is reduced to aminimum.

The arrangement of the bar B with the attachment bar B and the bar Cwith the sighting telescope C is, apart from a few constructionaldetails which are unimportant in so far as this invention is concerned,the same as in the first construction of the present invention and neednot therefore be more fully described. It need only be mentioned thatthe range graduation 71* is not arranged, as in the first construction.on a member (a fixed to the slide carrier A, but on the attachment bar,and the reading-off mark a cooperating therewith is correspondinglyarranged on the attachment sleeve at. Furthermore, the rocking lever F,with its slot f and the sliding piece G guided therein, is arranged, asin the first construction, between two lugs 7r corresponding to the lugsE, and is pivotally mounted on the bar B by means of two pins c and c.This sliding piece G is also connected to the bar C by a connecting rodof the above given length. The pivot bolts which serve to connect theconnecting rod H with the sliding piece G and the bar C, are likewisedenoted by g and c as in the first construction.

Whereas, however, in the first constructional example the rocking leverF can be secured in different angular positions with respect to the lugsE on the bar B by means of worm gearing, in the second construction itis adapted to rotate relatively to the lugs b on the bar B whichcorrespond to the lugs E, when the bar B is adjusted and is positivelyguided by means of the connecting rod which is composed of three parts JJ 2 as. GEGMETREGAL lNSTRUiVliEF-l'ltfi.

and J 3 which can be adjusted relatively to each other. This connectingrod J J J is, like the connecting rod J of the first construction,connected to the slide carrier A, but is not attached, as in the firstconstructional example, to the connecting rod H, but to the rockinglever F. In order that the positive action of the adjusting apparatusmay not be lost by the movement of the rock lever F when the sightingdevice is being adjusted, there is mounted on the said rocking lever aself-locking worm L, which is provided with a milled head and gears intoa series of teeth g on the sliding piece G, and by means of which thesaid sliding piece G can be secured in various angular positions in therecess 7. The adjustment imparted to the sliding piece G is read off bymeans of a pointer 9 (see Figs. 8 and 12), which is connected to thesliding piece by a pin 9 (see Fig 12), and is situated opposite agraduation 7 (see Fig. 8) arranged on the rocking lever F. A slot f (seeFig. 8) is provided in the rocking lever for the pin 9 The connectingrod J J J 3 is attached to the slide carrier by a sleeve of, whichconsists of a bolt N (see Fig. 10) and acts as a pivot pin for theconnecting rod. The bolt N can be moved in straight guides 72 (see Figs.6, 8 and 10) which are provided for the stem of the bolt, and a squarehead al (see Fig. 10) on the bolt in a plate P. The sleeve n bearsagainst this plate P, and also against a nut n screwed onto the bolt N,so that the bolt can be secured relatively to the plate P by tighteningup the nut 01*. The plate P is adapted to move at right angles to thelongitudinal direction of the guides p on a plate R attached to theslide carrier A. For this purpose guide slots 29 are provided in theplate P for bolts S which engage in the plate R- with a square head 8(see Fig. 10) and carry nuts 6 by means of which the plate P can besecured relatively to the plate R. This arrangement enables the bolts Nto be adjusted in different parallel positions to each other.Furthermore, for the purpose of making the connectingrod J J Jadjustable in length, the part J 3 thereof, which embraces the parts Jand J 2 thereof like a sleeve, is provided with longitudinal slots i(see Figs. 6 and 8) for bolts T (see particularly Fig. 11), which boltsT are passed through apertures in the parts J and J of the connectingrod, and carry a head t (see Fig. 11) and a nut The description of theworking of the sighting device will be commenced when the position ofthe parts are as shown in Fig. 6, in which the telescope C is adjustedto the zero of the range graduation, and the rocking lever F and thesliding piece G are situated in that position in which the axis ofcurvature of the guide f coincides with the axis of the pivot bolt 0 andthe axis of the pins 6 and 6 with the axis of the bolt 9 When using thesighting device, the attachment bar B is adjusted to the elevation whichcorresponds with the range of the tar get, by rotating the milled head6Z1. This adjustment of the attachment bar is taken up by the bar Cwhich rotates with it about the axis of the pin a since the axes of thebolts and of the pins 6 and 6 cannot alter the above described relativeposition, and in such a way that it itself rotates and consequently withit also the telescope C relatively to the slide carrier through the sameangle as the attachment bar B When this takes place, the connecting rodJ J J oscillates on the sleeve n and the bolt N respectively in thedirection of the arrow :0 (see Fig. 6), and the rocking lever Foscillates relatively to the bar B in the direction of the arrow z (seeFig. 6).

If, however, the initial velocity of the pro jectile has been diminishedsay by erosion of the barrel of the gun for example, the guide piece Gis moved by the gearing L g in the guide 7' in the direction of thearrow 2 (see Fig. 6), until the pointer g is opposite the graduationmark of the graduation 7 which corresponds to the diminished initialvelocity (see Fig. 8). The axis of the bolt g then no longer coincideswith the axis of the pins (2 and 6 the result of which is that thegearing F G g H J J J augments the angular adjustment imparted to thesighting telescope C when the attachment bar B is adjusted by an amountwhich corresponds to the diminished initial velocity. When the sightingtelescope is adjusted to the angle corresponding to the zero of therange graduation, this amount is itself equal to zero as the axis ofcurvature of the guide f coincides with the axis of the bolt 0 when theattachment bar 13 is adjusted to correspond to the zero of the rangegraduation, and increases with the increasing angle of adjustment.

In comparison with the apparatus of the first construction, theapparatus just described offers the advantage that the gearing which isprovided for making allowance for the influence of the diminishedinitial velocity, only executes oscillating movements when the sightingtelescope has been adjusted. In consequence thereof the wear and tear ofthis gearing is reduced to a minimum, and a permanently accurate adjustment of the sighting device insured.

If the trajectory of the projectile be altered by the use of anotherprojectile or another propelling charge, the bolt N and the length ofthe connecting rod J J J is adjusted when the parts B C H F G are in theposition shown in Fig. 6, in a suitable manner by the aid of the abovedescribed arrangement, and in particular and conveniently by means ofscales and marks which are provided on the corresponding parts.

Claims.

1. A sighting device for ordnance mounted for movement with the gunwhich comprises a slide carrier, a pair of rods pivotally supported atone end thereof on said slide carrier, a sighting telescope carried byone of said rods, means for moving said rods to adjnst.-theltelescgpe,said means embodying a range device on the carrier and meansindependently adjustable of the carrier and embodying a slidingconnection for operatively connecting the pivotally mounted rods.

2. A sighting device for ordnance which comprises a slide carrier, apair of bars,

means pivotally supporting said bars at one end thereof on said slidecarrier so that they take part in the elevation of the gun barrel, a siing t-elesggpgwfif llfriedlbialoneo said are, adjusting means for theother bar, "sa1d'adjusting means embodying a range device on saidcarrier, and means operatively connecting said bars to one another whichembodies a connecting rod pivoted at one end to one of said bars, arocking lever slidably supporting the other end of said connecting rodand means for adjusting said rocking lever to different angularpositions with respect to said other bar, said connecting rod beingconnected by a second rod to the bar supporting means.

3. A sighting device for ordnance which comprises a slide carrier, apair of bars pivotally supported at one end thereof, a sightingtelescope carried by one of sand bars, means supported on the slidecarrier for adjusting the other of said bars to correspond to thedesired range and means independently adjustable and embodying a slidingconnection fixed on the other bar for imparting to the telescopecarrying bar an additional correction which compensates for the erosionof the gun barrel.

4. A sighting device for ordnance which compromises a slide carrier fora gun, a bar pivotally mounted thereon at one end, a sighting telescopecarried by the free end of said bar, a second bar pivotally supported atone end thereof, concentric with said first bar, means on the carrierembodying a range device for adjusting said second bar to correspond tothe desired range, and means embodying a range correction device foroperatively connecting said second bar to said telescope carrying bar,said means embody- 6 ing a rocking lever carried by said second bar, aconnecting rod secured to said first bar and. having a slidingconnection with said rocking lever, means for angularly adjusting saidrocking lever and a second rod connecting said first mentionedconnecting rod to the slide carrier.

5. A sighting device for ordnance which comprises a gun slide carrier, apair of bars pivotally supported at one end thereof, a sightingtelescope carried by the free end of one of said bars, means foradjusting the other bar to correspond to the desired range, said meansembodying a range indicating device, a range correction deviceoperatively connecting said telescope bar to the other bar whichembodies a rocking lever, a connecting rod adjustably connected to saidrocking lever and pivotally secured to said telescope carrying bar andan adjustable connecting rod, connecting said rocking lever to the slidecarrier.

6. A sighting device for ordnance which comprises a bar pivotallymounted on one end, means for fixing the sighting line on said bar, asecond bar pivotally supported at one end thereof, concentric with saidfirst bar, means embodying a range device for adjusting said second barto correspond to the desired range, and means embodying a rangecorrection device for operatively connecting said second bar to saidfirst bar, said range correcting means comprising a rocking levermounted on said second bar, a sliding piece mounted on said rockinglever, a connecting rod secured to said first bar and said slidingpiece, a second rod connecting one of said range correcting means to apart of the gun which takes part in the elevation of the gun barrel anda gear inserted in the train comprising said second bar, the rockinglever and said sliding piece for adjusting one of the two last-namedmembers relatively to the part on which it is mounted.

7. A sighting device for ordnance which comprises a bar pivotallymounted on one end, means for fixing the sighting line on said bar, asecond bar pivotally supported at one end thereof, concentric with saidfirst bar, means embodying a range device for ad justing said second barto correspond to the desired range, and means embodying a rangecorrection device for operatively connecting said second bar to saidfirst bar, said range correcting means comprising a rocking levermounted on said second bar, a sliding piece mounted on said rockinglever, a connecting rod secured to said first bar and said slidingpiece, a second rod connecting said rocking lever to a part of the gunwhich takes part in the elevation of the gun barrel and a gearinterposed between said sliding piece and the rocking lever foradjusting the sliding piece relatively to the rocking lever.

8. A sighting device for ordnance which comprises a bar pivotallymounted on one end, means for fixing the sighting line on said bar, asecond bar pivotally supported at one end thereof, concentric with saidfirst bar, means embodying a range device for adjusting said second barto correspond to the desired range, and means embodying a rangecorrection device for operatively connecting said second bar to saidfirst bar, said range correcting means comprising a rocking levermounted on said second bar, a sliding piece mounted on said rockinglever, a connecting rod secured to said first bar and said slidingpiece, a second rod of adjustable length pivotally secured to one ofsaid range correcting means and t djn stably connected to a part of thegun Whichtakespartmin.thereleva'tion 'o'fthe gunbarrel and a gearinserted 1n the tram comprising sald second bar, the

rocking lever and said sliding piece for adjusting one of the twolast-named members relatively to the part on which it is mounted.

The foregoing specification signed at Essen, Germany, this 15th day ofJune, 1920. MAX BARTHOLDY. In presence of- HANS Go'r'rsMANN, JosEFOLBERTZ.

